Home / 28,137.83-38,828.61-15,388.47

Finding the Fourth Proportional to 28,137.83, 38,828.61 and 15,388.47

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Solution

The fourth proportional to 28,137.83, 38,828.61 and 15,388.47 is: 21,235.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.83 : 38,828.61 = 15,388.47 : x
  2. Step 2: Convert to fraction form
    28,137.83/38,828.61 = 15,388.47/x
  3. Step 3: Cross multiply
    28,137.83x = 38,828.61 × 15,388.47
  4. Step 4: Simplify right side
    28,137.83x = 597,512,900.13
  5. Step 5: Solve for x
    x = 597,512,900.13/28,137.83
  6. Step 6: Final answer
    x = 21,235.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.